the real OS X 10.6 Malware protection
The real OS X 10.6 malware protection is the improved stack-smashing protection, and Safari sandboxing, among other new security features Apple aren't talking about because they don't want to make earlier OS X look as relatively insecure as it was compared to features in Vista and Linux. (Though Vista is a craptacular operating system, it had new (for Windows) security features that made it, in theory, more secure than OS X Leopard.) As easy as it is to make fun of the feature mentioned in the article, that is only a small part of under-the-hood malware protection in Snow Leopard. I suspect hackathons will be much less embarassing in the future for Apple.